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Old 01-16-2013, 03:08 PM   #1 (permalink)
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Default Need thicker gasket

I'm putting on my exhaust manifold and would like a gasket thicker than the fel-pro. Who sells that kind. How tight should you get the bolts
Mike

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Old 01-16-2013, 03:20 PM   #2 (permalink)
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There is really no need for gaskets on exhaust manifolds. If you doubt that, consider that the factory didn't use them either.

As for tight, the shop manual can provide a torque value. As for myself, I draw them down just snug + about 1/8 turn more.
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Old 01-16-2013, 03:38 PM   #3 (permalink)
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Is there a leak? Are the headers warped or badly rusted?

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Old 01-16-2013, 04:52 PM   #4 (permalink)
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The surfaces are a little rough
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Old 01-16-2013, 05:37 PM   #5 (permalink)
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A machine shop can surface the contact areas of the manifold. Then use clean bolts and Ultra Copper silicone sealant. Bruce
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Old 01-17-2013, 10:59 AM   #6 (permalink)
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Quote:
Originally Posted by mwaller5672 View Post
I'm putting on my exhaust manifold and would like a gasket thicker than the fel-pro. Who sells that kind. How tight should you get the bolts
Mike
I have a 460cid which are notorious for exhaust leaks. I fixed it with a gasket from (I think) Mr. Gasket. They told me that if I add an suffix A after their gasket part number that it would be made out of thicker, soft AL. You should call them to verify.
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Old 01-17-2013, 11:31 AM   #7 (permalink)
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Quote:
Originally Posted by LindenBruce View Post
A machine shop can surface the contact areas of the manifold. Then use clean bolts and Ultra Copper silicone sealant. Bruce
Right---a good machine shop should have a large belt sander to lay it on and get a good flat surface across. You could check them with a good straight edge also.
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Old 01-18-2013, 01:47 PM   #8 (permalink)
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Quote:
Originally Posted by mwaller5672 View Post
I'm putting on my exhaust manifold and would like a gasket thicker than the fel-pro. Who sells that kind. How tight should you get the bolts
Mike
Had a similar situation on my '00 lightning exhaust. Got a set like this Percy's 66035 Percy's Seal-4-Good Header Gaskets= and cured the problem for good. And they are reusable to boot.
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Old 01-18-2013, 03:18 PM   #9 (permalink)
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The Percy's gaskets are nice. I'm using them with my JBA headers.
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